What is is a private IP Address, which is often used by broadband router and modem manufacturers to enable a user to access the device. This IP Address is to be entered in the Address bar of the web browser running on a computer, which is attached to the device. Through this, the user can change the settings of the device as per his requirements and needs.

What is a Private Network and Private IP Address

Early network design, when global end-to-end connectivity was envisioned for communications with all Internet hosts, intended that IP addresses be uniquely assigned to a particular computer or device. However, it was found that this was not always necessary as private networks developed and public address space needed to be conserved.

Computers not connected to the Internet, such as factory machines, routers and other networking rquipments that communicate only with each other via TCP/IP, need not have globally-unique IP addresses. Three ranges of IPv4 addresses for private networks have been reserved. These addresses are not routed on the Internet and thus their use need not be coordinated with an IP address registry.

Today, when needed, such private networks typically connect to the Internet through network address translation (NAT).

IANA-reserved private IPv4 network ranges
Start End No. of addresses
24-bit Block (/8 prefix, 1 × A) 16777216
20-bit Block (/12 prefix, 16 × B) 1048576
16-bit Block (/16 prefix, 256 × C) 65536

. Router Password, Login, Username Settings

Given below is a compiled list of the some of the most popular brands of the networking devices and broadband router alongwith the default IP address fabricated withing their firmware, their default passwords and username details. Please feel free to check if your router is listed in this list.